Enum ReadConsistencyPolicy 

#[repr(i32)]
pub enum ReadConsistencyPolicy {
    LeaseRead = 0,
    LinearizableRead = 1,
    EventualConsistency = 2,
}

Read consistency policy for controlling read operation guarantees

Allows clients to choose between performance and consistency trade-offs on a per-request basis when supported by the cluster configuration.

Variants

LeaseRead = 0

Lease-based reads for better performance with weaker consistency

Leader serves reads locally without contacting followers during lease period. Provides lower latency but slightly weaker consistency guarantees.

LinearizableRead = 1

Fully linearizable reads for strongest consistency

Leader verifies its leadership with a quorum before serving the read, ensuring strict linearizability. Guarantees that all reads reflect the most recent committed value in the cluster.

EventualConsistency = 2

Eventually consistent reads from any node

Allows reading from any node (leader, follower, or candidate) without additional consistency checks. May return stale data but provides best read performance and availability. Suitable for scenarios where eventual consistency is acceptable.

Implementations

impl ReadConsistencyPolicy

pub fn is_valid(value: i32) -> bool

Returns true if value is a variant of ReadConsistencyPolicy.

pub fn from_i32(value: i32) -> Option<ReadConsistencyPolicy>

👎Deprecated: Use the TryFrom<i32> implementation instead

Converts an i32 to a ReadConsistencyPolicy, or None if value is not a valid variant.

impl ReadConsistencyPolicy

pub fn as_str_name(&self) -> &'static str

String value of the enum field names used in the ProtoBuf definition.

The values are not transformed in any way and thus are considered stable (if the ProtoBuf definition does not change) and safe for programmatic use.

pub fn from_str_name(value: &str) -> Option<Self>

Creates an enum from field names used in the ProtoBuf definition.

Trait Implementations

impl Clone for ReadConsistencyPolicy

fn clone(&self) -> ReadConsistencyPolicy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ReadConsistencyPolicy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ReadConsistencyPolicy

fn default() -> ReadConsistencyPolicy

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ReadConsistencyPolicy

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<ReadConsistencyPolicy> for ReadConsistencyPolicy

fn from(proto_policy: ReadConsistencyPolicy) -> Self

Converts to this type from the input type.

impl From<ReadConsistencyPolicy> for ReadConsistencyPolicy

fn from(config_policy: ReadConsistencyPolicy) -> Self

Converts to this type from the input type.

impl From<ReadConsistencyPolicy> for i32

fn from(value: ReadConsistencyPolicy) -> i32

Converts to this type from the input type.

impl Hash for ReadConsistencyPolicy

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ReadConsistencyPolicy

fn cmp(&self, other: &ReadConsistencyPolicy) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ReadConsistencyPolicy

fn eq(&self, other: &ReadConsistencyPolicy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ReadConsistencyPolicy

fn partial_cmp(&self, other: &ReadConsistencyPolicy) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for ReadConsistencyPolicy

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<i32> for ReadConsistencyPolicy

type Error = UnknownEnumValue

The type returned in the event of a conversion error.

fn try_from(value: i32) -> Result<ReadConsistencyPolicy, UnknownEnumValue>

Performs the conversion.

impl Copy for ReadConsistencyPolicy

impl Eq for ReadConsistencyPolicy

impl StructuralPartialEq for ReadConsistencyPolicy